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kernel/linux-imx6_3.14.28/arch/mips/ath79/prom.c 1.24 KB
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  /*
   *  Atheros AR71XX/AR724X/AR913X specific prom routines
   *
   *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   *
   *  This program is free software; you can redistribute it and/or modify it
   *  under the terms of the GNU General Public License version 2 as published
   *  by the Free Software Foundation.
   */
  
  #include <linux/kernel.h>
  #include <linux/init.h>
  #include <linux/io.h>
  #include <linux/string.h>
  
  #include <asm/bootinfo.h>
  #include <asm/addrspace.h>
  
  #include "common.h"
  
  static inline int is_valid_ram_addr(void *addr)
  {
  	if (((u32) addr > KSEG0) &&
  	    ((u32) addr < (KSEG0 + ATH79_MEM_SIZE_MAX)))
  		return 1;
  
  	if (((u32) addr > KSEG1) &&
  	    ((u32) addr < (KSEG1 + ATH79_MEM_SIZE_MAX)))
  		return 1;
  
  	return 0;
  }
  
  static __init void ath79_prom_init_cmdline(int argc, char **argv)
  {
  	int i;
  
  	if (!is_valid_ram_addr(argv))
  		return;
  
  	for (i = 0; i < argc; i++)
  		if (is_valid_ram_addr(argv[i])) {
  			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  			strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
  		}
  }
  
  void __init prom_init(void)
  {
  	ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
  }
  
  void __init prom_free_prom_memory(void)
  {
  	/* We do not have to prom memory to free */
  }